SD Valve Covers

SD diesels were widely available in the US in the 1981-86 Datsun/Nissan 720 pickups, and in Canada through '87 in the D21 pickup.

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asavage
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SD Valve Covers

#1

Post by asavage »

A place to compare various SD valve covers?

Image

That level of cleanliness reflects about a half-hour's worth of cleaning.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
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Tom Young
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Mine is not that clean.

#2

Post by Tom Young »

I removed it to adjust valves a month or so ago. I notice the tapped hole for the fitting and hose on top Al. What is the purpose of the vacumn like line that attaches to the fitting that's threaded into the cover next to the aft bolt? DQ.
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#3

Post by asavage »

I don't know; I haven't seen a hose like that, except as a crankcase breather on later units. Maybe Philip will post one of his SD25 pics here with that setup.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
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philip
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#4

Post by philip »

asavage wrote:I don't know; I haven't seen a hose like that, except as a crankcase breather on later units. Maybe Philip will post one of his SD25 pics here with that setup.
I'd have to see ... to understand. :wink:

Here's something unusual. The oil screwed cap is in the center.

Image

Image
Last edited by philip 18 years ago, edited 1 time in total.
-Philip
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22

"Im slow and I'm ahead of you"
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plenzen
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#5

Post by plenzen »

What is that fastened to the top of the FP? Also, what is fastened to the front of the timing cover? A tach drive of some kind? They had a thing that fit on the marine industrial engines that drove a cable or electric tach but it sure did not look like that.

P
Retired Pauly
Problem with being retired is that you never get a day off.
1987 D21-J SD25 KC
KJLGD21FN
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philip
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#6

Post by philip »

plenzen wrote:What is that fastened to the top of the FP? Also, what is fastened to the front of the timing cover? A tach drive of some kind? They had a thing that fit on the marine industrial engines that drove a cable or electric tach but it sure did not look like that.

P
Scroll back up to picture/explanation. :wink:
-Philip
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22

"Im slow and I'm ahead of you"
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